Portable storage container base



FIG. 1 is a top perspective view of a portable storage container baseshowing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines showing structure in the middle portion of the coverare for the purposes of illustrating environment and form no part of theclaimed design.

CLAIM The ornamental design for a portable storage container base, asshown and described.